Jolt ramming-machine.



L. M. ATHA & E. H. MUMFORD. JOLT RAMMING MACHINE.

111211101111011 rILmJ 11110.11, 1910.

1,040,989, Patented 001,15, 1912.

a sHnn'rs-BHBBT 1.

L. M. ATHA & E. H. MUMFORD.

Patented Oct. 15, 1912.

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LOUIS M. ATI-IA, F NEWARK, AND EDGAR H. MUMFORD, 0F PLAINFIELD, NEW JERSEY.

JOJT RAMMING-MACHINE.

Toallwhomt may concern: l z.Be.itfknownfthat we, Louis M. A'rna and 'iEncAniH.Montrond citizens of the United States; 'and residents of Newark, Essex county-,land Plainfield, Union county, State of New. Jersey, respectively, have invented .certain new and useful Improvements in .Jolt Ramn'iing-Machines, of which the folflowing is a specification. f .{Ehis invention relates to improvements in .joltcramming machines and it is es )eeially adapted to he used for forming santi molds. yOne of the objects of the invention is to construct such a machine provided with means 1 5 Eforxpreventing the table from whipping and 'i from rebounding and vibrating by iirpact when dropped. Other objects will appear `from the hereinafter description.

.Cert-ain embodiments of the invention are :hereinafter set forth and illustrated in the accompanying drawings. It is to he understood that changes may be made in the construction here .illustrated and described, .without departing from the' spirit .and scope of the invention.

Referring to the drawing in which the same reference character designates the same .part in .the several views:

Figure ,1 is a plan view of a machine. ..30 `Constructed Yfor a square table. In this view r one half of the top of the table is'shown removed.

Fig. 2 is a section on line 2 of Fig. 1, vshowing the table in raisednposition.

F.i'g. 3 is a section on line 3 of Fig. 1,.

showing the table in lowered position.

4Fig. 4, -is a sectionv of a part of the machine on line 4 ofFig. l', showin a detail. Fig. is a plan view of a modified constructionshowing amachine built for a round table. .In this view one-half ot the top of the table is shown removed.

Fig. Gis a section on line 6 of Figo, showing thetable in raised position.

` Figlf', is a section on line.7 of Fig. 5, showing the table in loweredposition.

Fig. 8 isa rsect-ion of a part of the machine on line 8 'ot' Fig. 5, showing a detail.

The part marked 10 on the drawing represents` the base ofthe machine which 1s provided with an outwardly extending `flange 11b vwhich the basemay be secured to a slitta le bed 12 byjbolts 13 passing through holes in the flange and into the bed. As one means forralisingA the table, the 4bed is proyided,'withfsuitablebearings 1&1` for the inf Specification of Letters Patent.

vApplication filed August 6. 1910. Serial No. 575,927.

' Patented Oct. 15,1912.

ner end of the driving shaft 15, and with a suitable recess 16 for a lifting cam 17 secured to the shaft between the bearin s. 'lhe base is recessed at 18 to receive t e huh 19 projecting from the under side of the table 20, which forms a plunger which operates in the'recess. The base is also provided with an opening 21'through which passes the rod 22 secured to or forming a part of the plunger. This rod is slotted at its lower end to receive the roller 23 against which the' lifting cam 17 operates. The opening 21 may be provided with a 1in ing 24 to take up wear, and the bottom of .the reeess'18 may he provided with a pad or shock absorbing element 25. In the wall of the base of the machine `forming the ,ref cess 18 is an opening 26 which is controlled preferably by a spring seated relief valve 27. 'lhe surface ol the cam 17 is so shaped that when the highest point a thereoi'` passes from under the roller the table is permitted to fall. 'lhe lowest point b of the cam is so arranged that the roller will not eo're in contact with the same upon the dropping of the table. B v this construction the life ot' the roller and 0am will he niaterially prolonged and the shaft 15 will not be hammered out of alinea-ent by the drop- 35 ping of the table.

lVhile we have shown a cam construction for raising` and perniitling the table tobe dropped, 1t is to be understood that we do not confine 'ourselves to such construction, as air or other fluid operating lifting and droppingmeans may be used.

In the construction shownl by xFigs. 1 to 4,. the table is square and a square wall 28 surrounds the base of the machine, and this wall preferably extends upwardly from the tlange 1l. The base and wall are connected by the webs 29 and 30, the weh 29 extending to the corners' oi' the wall and the weh B0 extending to the middle thereof. The cor-'10U ners of the wall are provided at the top with inwardly projecting flanges' 31 which may he termed pads or hearing surfaces, and extending upwardly from the wall and from 'the inner ends of said flanges is a ring 105 32 having on the upper rim thereof a ange vforming a tongue'which enters the groove or channel 34 formed in the thickened eircular under part 35, of the table directly over said ring.` "The outer wall 36 of t e 110 said groove or channel extends below t e tongue 33 and acts as a guide to the tongue 2K5-the channel or groove.

and prevents dirt fro u getting on the tongue. The inner'wall 87, if desired, may also be extended below the tongue. The corners of the table on its under side aire thickened at 38 to form pads or bearing surfaces which contact with the corner padsl 31.

In operation, the shaft is rotated tol y table the said air is compressed and is forced out through said opening and through said valve. The rapidity with which the air en-4 ters and is -forced out of the recess is'gov# erned by the Valve 27. On the downward I movement of the 4table the tongue 32 enters the/groove 34 and the air therein is com. pressed, said tongue acting as a`plnnger in The tongue and groove. are so fitted that the air compressed willy gradually escape from the groove upon the fall of the table, forming a dash. This compression of the air in the recess 18 and in 430 the channel 33 form-s a cushion which pre- .vents the table from whipping and also prevents it or objects thereon from rebounding upon impact, and absorbs all vibration. The cushion at the bottom -of the recess 18 also takes up jar, and the flanges or pads 31' assist in receiving shock when the table drops. -t

Figs. 5 to 8 inclusive show a modified construction. In this construction the table 20 is circular and the base issurrounded by a circular Wall 28a. In this construction the upper part of the web 29 next the wall is thickened to form pnds'or bearing surfaces 31a and the under side of thc'table directly over said pads is also thickened to form pads 381. der sido ofthe table atits periphery is thick- `ened toform a .ring 35 vwhich is recessed to form\thc channel or groove 34"V int-o which '50 the flange or tongue 33d' enters.v In this construction thc tongue 33u is formed directly on the upper rim of the circular wall 28.

While ,the base and wall are shown integral and connected by webs and flanges, it is 'to be understood that these different elements muy be formed in'separate parts.

"l`o`prevcntythe rotation of the table and in order to keep it in perfect alinement during its movement, we provide on the under side thereof, a lug 39 in which is secured a in 40, which pin inoves freely in an openlng 41 in a boss 42 formed on the web 30. The wall of the base of the machine through which the driving shaft 15 passes ma be Y setightly packed andthe chamber in wlich In this modified construction theuny the cam 17 and the rollers 23 are mounted and operated may be filled with oil so that these parts' may run in oil. v

We desire it to be understood that the language used in the'following claims is in- 70 tended to cover all of the generic and speciic features of the invention herein described andall statements of the ,scope of the invention, which, as aniatterl of language,.might be said to fall therebetween.

As many changes could be made in the above construction, and many apparently Widely different embodiments of the invention could be made without departing from the scope thereof, we intend that all matter contained in the above description or shown in -the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. Having now described our invention, what we claim as new and desire to secure by Letters Patent is:v i sa 1. ln a device of the class described, a base having a recesstherein, a table, a plunger connected to the table and moving in' 90 the recess, means for raising the table-and permitting the same to drop, the Wall of the recess having an opening therein and communicating with the recess to permit air un- `der the plunger to escape upon the drop of the table.

2. In 'a device of the class described, Ya table. a support, one of said elements having a grooveA therein and the other provided with' a'corresponding tongue, and means for l100 raising the table and permitting it to drop,

the tongue entering the groove, upon the drop of the table. y i

3. In aA device of the class described,A a' table having'a recess on the under side there- 105 of, a corresponding tongue entering said recess, rand means for raising the t-able and i permitting it to drop the tongue'entering the recess upon the drop of the table.

4; In a device of the classdescribed, a 1.10

base,'a table mounted on the base, means forv raisingr the table and permitting' it to drop, suid table havinga groove on the under side thereof, and a tongue coperating (with said A groove the tongue entering the groove upon 1 15 the drop of the table.'

5. In a device of the class described,` a base, a table mounted on`said base, a channel'on the under side of the table, means for raising the table and permitting it to `12o drop, a wallvsurrounding the base and hav-y ing a ,flange on the upper side thereof, said flange entering the channel upon-the drop of the table. l y V 6. In a device of the class described, a base 1/35 having a recess therein and an opening in the base communicating with said recess, a table having a plunger on the under side thereof moving in said recess, said table having a channel'on the under side thereof, .1.30

a flange cooperating with said channel, and means for raising,r the table and permitting the same to drop, the flange entering the channel upon the drop ot the table.

7. In a device of the class described, a base having a recess therein and an opening in the base communicating with said recess, a table having a plunger on the under side moving in said recess, said table having a channel on -the under side thereof and a wall surrounding the base, a rllange on the top of the 'all which enters the channel upon the drop of the table, and means for raising the table and pern'iitting the saine to drop.

8. In a device of the class described, a base having a recess therein and an opening communicating with said recess, a valve controlling said opening, a table having a plunger on the under si'de and moving in said recess, said table having a channel or groove on the under side thereof, means for raising the table and permitting the same to drop, a wall surroululing the base, and a flange or tongue on the top of the wall which enters the groove upon the drop ot' the table.

E). In a device ot the class described, a base having a recess therein and an opening eomi'minicating with said recess, a table, a plunger connected with the. table and movable in said recess, the under side of the table being provided with a groove, means for raising the table and permitting the same to' drop, a wall surrounding the base, webs extending from the base to the wall, and a tongue at the top ot' the wall adapted to enter the grooveon the underside of the table.

10. In a device of the class described, a base having a recess therein and an opening communicating with said recess, a valve controlling` said opening, a table, a plunger connected to the under side of the table and moving in said recess, the under side of the table being provided with an annular channel, a wall surrounding the base, webs ex- `controlling said opening,

tending from the hase to the wall, pads eonv nected to the wall, pads on the under side of the table co-acting with the first mentioned pads, and an annular flange or tongue at the top of the wall enteringr the annularchannel when the table is permitted to drop.

11. In a device ot' the class described, a. base having a recess therein and an opening communicating with said recess, a valve a table, a plunger connected to the under side ot' the table and moving in said recess, the under side of the table being provided with an annular channel, a wall surroimding the base, webs extending Vfrom the base to the Wall, flanges connected to said wall, lugs forming pads on the under side of the table co-acting with said llanges, an annular tlange'at the'top of;- the wall adapted to enter the annular chan=` nel when the table is permitted to drop, a"

pin carried by the table, and a boss having an opening therein on one of the Webs, the pin moviwg in said boss.

l2. [t jolt ramming machine comprising in combination, a table, a guide means,l a :asing within which said guide means operates, mechanical means for actuating' said table and a pneumatic cushion for said guide means.

13. A jolt rainming machine comprising in combination, a table, a guide means, a casing within which said guide means 0pcrates, mechanical means for actuating said table, a pneumatic cushion for said guide means, and means for controlling said cushion.

In witness whereof we have hereunto set our hands at the cit-y of New 4York, county of New York and Statelof New York, this fourth day of August, 1910.

LOUIS M. ATHA. EDGAR H. MUMFORD. In presence of,g

' AGNES C. ,OCONNELL, ISABEL R. RICHARDS. 

